spatialrisk 0.8.1

• Added a decomposed hotspot workflow with prepare_spatialrisk(), select_candidates(), and optimize_hotspot(). These functions expose the preparation, candidate-selection, and optimisation steps used by concentration_hotspot(), while keeping concentration_hotspot() available as the main wrapper for the complete workflow.
• Improved concentration_hotspot(method = "continuous") and optimize_hotspot() so pair-intersection refinement is evaluated over all focal candidate cells above the lower bound, rather than only around the top focal cell. Candidate centres are now scored against the full remaining portfolio before the best hotspot is selected. This avoids cases where a later top_n hotspot could have a higher concentration than the first reported hotspot.
• Added a regression test to check that continuous top_n hotspot concentrations are non-increasing after contributing points are removed between iterations.

spatialrisk 0.8.0

Main API changes

• Added concentration_hotspot() as the main function for fixed-radius concentration hotspot detection. The function returns a hotspot object with hotspots and contributing_points components.
• Added method = "continuous" as the default method for concentration_hotspot(). It searches for hotspot centres that may lie between observed points, using spatial screening followed by Rcpp pair-intersection refinement. If the local subset exceeds max_refinement_points, it falls back to method = "grid".
• Added method = "observed" to concentration_hotspot(), an experimental Rcpp spatial-indexing alternative that searches observed point locations only.
• Deprecated find_highest_concentration() in favour of concentration_hotspot(). The deprecated function remains available for existing code.
• Renamed the concentration() workflow to radius_sum(), with clearer targets and reference arguments. The old concentration() function remains available as a deprecated compatibility wrapper.
• Renamed radius_sum(display_progress = ) to radius_sum(progress = ) for consistency with concentration_hotspot().
• Renamed points_in_circle() to points_within_radius(). The old function remains available as a deprecated compatibility wrapper.
• Replaced points_to_polygon() with summarise_points_by_polygon(), which more clearly describes joining point data to polygons and summarising a numeric point attribute. The old function remains available as a deprecated compatibility wrapper.
• Renamed plot_points() to map_points(). The old function remains available as a deprecated compatibility wrapper.

Function improvements

• Improved haversine() and the underlying C++ distance calculation by reducing unnecessary operations and adding stricter input checks.
• Improved points_within_radius() validation and handling of multiple centre coordinates.
• Improved radius_sum() validation, output column handling, and C++ prefiltering of incomplete reference rows.
• Updated concentration_hotspot() documentation to clarify that the function uses a grid-based search with local refinement. The search precision is controlled by cell_size and grid_precision.
• concentration_hotspot() now uses progress instead of print_progress. Since this is a new public API, the old argument is not retained there; older deprecated functions still translate their legacy progress arguments.
• Deprecated interpolate_spline() because spline interpolation is outside the main scope of the package. The function remains available for compatibility.

Mapping and visualisation

• Consolidated choropleth mapping around choropleth(), using tmap for both static and interactive output.
• Deprecated choropleth_ggplot2() in favour of choropleth().
• Moved optional visualisation packages such as mapview, tmap, ggplot2, and classInt to Suggests.

Data and documentation

• Reorganised dataset documentation by topic: Dutch spatial boundary data, KNMI stations, insurance example data, and Groningen example addresses.
• Moved knmi_historic_data() to its own function documentation file and improved validation for years, station IDs, progress handling, failed downloads, and temporary-file cleanup.
• Added tests for package dataset schemas and knmi_historic_data() input validation.
• Added a main vignette on fixed-radius concentration analysis in an applied insurance setting.
• Updated the visualisation vignette to use the current choropleth() API.
• Rewrote the README in a more applied, method-oriented style suitable for use alongside an actuarial paper.
• Updated DESCRIPTION with a more specific title and broader package description.
• Centralised small deprecated compatibility wrappers in one file.

spatialrisk 0.7.3

• Updated and improved all function documentation (roxygen2).

spatialrisk 0.7.2

• Introduced find_highest_concentration(): a faster and more accurate alternative to highest_concentration(), leveraging focal statistics for optimal results.
• Deprecated highest_concentration() in favor of the new, improved function.
• Updated plot_points() to utilize mapview::mapview() for enhanced interactive map visualizations.
• Revised the README to reflect these new features and updates.

spatialrisk 0.7.1

• plot_points() now returns a warning when a specific provider tile is not available.

spatialrisk 0.7.0

• neighborhood_gh_search() now returns a more precise outcome when the radius of the circle is not equal to 200m.
• sf::st_crs() is used for sf objects to not show the message that old crs is detected anymore.

spatialrisk 0.6.9

• highest_concentration() now returns correct highest concentration when the circle of the highest concentration overlaps more than one geohash.
• plot.concentration() now handles many lon/lat pairs better.

spatialrisk 0.6.8

• highest_concentration() is added to do a fast search for the coordinates of the highest concentration.
• neighborhood_gh_search() is added to look for even higher concentrations in the neighborhood of the coordinates found by highest_concentration().

spatialrisk 0.6.7

• A package website is added using pkgdown.
• concentration() and points_in_circle() now return error messages when the data does not contain columns for lon and lat.
• concentration() and points_in_circle() have updated documentation.
• haversine() now returns NA when coordinates are missing.

spatialrisk 0.6.6

• points_to_polygon() is updated to keep spatialrisk and a new version of dplyr working together smoothly.

spatialrisk 0.6.5

• knmi_historic_data() and knmi_stations() are added to retrieve data from weather stations in the Netherlands.

spatialrisk 0.6.4

• interpolate_krige() and interpolate_spline() are added for interpolation and smoothing on the sphere.

spatialrisk 0.6.3

• Data sets nl_corop(), nl_gemeente(), nl_postcode1(), nl_postcode2(), nl_postcode3(), nl_postcode4(), and nl_provincie() now contain columns longitude and latitude for the centroid of the polygons.

spatialrisk 0.6.2

• Non UTF-8 character removed from column areaname in data set nl_gemeente().
• In choropleth(), n specifies the number of clusters in a map.
• In data sets nl_corop(), nl_gemeente(), nl_postcode1(), nl_postcode2(), nl_postcode3(), nl_postcode4(), and nl_provincie, column areaname now refers to the region.

spatialrisk 0.6.1

• In points_to_polygon(), outside_print shows the points that are not within any polygon.

spatialrisk 0.6.0

• points_to_polygon() is added.
• Data sets europe_countries() and world_countries() are added.

spatialrisk 0.5.1

• In concentration() the algorithm for testing if a point is inside a circle is updated by testing whether the point is inside a square diamond inside the square.

spatialrisk 0.3.1

• NEWS.md is added to track changes to the package.